Fumigation index

The gassing index (also (gas) throughput index , gas volume flow index or briefly gassing index ; symbol : Q ) is a dimensionless index in process engineering and biotechnology that describes the ratio of the gas supplied to the speed of the stirrer . It is defined as

${\displaystyle Q={\frac {{\dot {V}}_{G}}{n\,{d_{R}}^{3}}}}$.

Formula symbol	designation	unit
${\displaystyle {\dot {V}}_{G}}$	incoming gas volume flow	${\displaystyle \mathrm {\frac {m^{3}}{s}} }$
${\displaystyle n}$	Stirrer speed	${\displaystyle \mathrm {s^{-1}} }$
${\displaystyle d_{R}}$	Stirrer diameter	${\displaystyle \mathrm {m} }$

literature

• Marko Zlokamik: Rührtechnik . Springer, Berlin 1999, p. XX. ISBN 3-540-64639-6
• Hans-Peter Wilke: Mixing technology . Hüthig, Heidelberg 1988, p. 16 u. 56. ISBN 3-7785-1315-X
• Edward S. Gaddis: Heat transfer and power consumption in stirred kettles . In: VDI-Wärmeatlas, Chapter N3, 11th edition, Springer, Berlin 2013, p. 1646 u. 1650. ISBN 978-3-642-19980-6 , doi : 10.1007 / 978-3-642-19981-3_108